Though she didn't come back to her hometown for many years，she could still________some scenes of childhood.

(2013·湖北，22)Carbon dioxide, which makes a________between us and the sun, prevents heat from getting out of the atmosphere easily, so the earth is becoming warmer.

At the meeting, the old man _____ some good advice about bringing down the market price of housing.

To our great surprise, we got _____ people to attend the conference as we expected.

---Your ceiling requires ________. --- Yes, I’ll have some workers _______ it